Chickenpox

Chickenpox (varicella) is a common contagious illness caused by a type of herpes virus. Chickenpox is most contagious from 2 to 3 days before a rash develops until blisters have crusted over.

Chickenpox is most common in children and is usually not serious. In teenagers, adults, pregnant women, and people who have impaired immune systems, chickenpox can be more serious.

The incubation period—the time from exposure to the chickenpox virus until a person develops symptoms—is usually 14 to 16 days but can be from 10 to 21 days. Symptoms of chickenpox include a fever, feeling ill, and the development of a widely scattered, itching rash with fluid-filled blisters. The blisters burst and crust over after several days. New blisters continue to develop for up to a week. A person infected with chickenpox can spread the virus before developing any symptoms.

Treatment for chickenpox focuses on preventing the person from scratching the rash and on relieving fever and discomfort. A vaccine to prevent chickenpox is available and recommended for children and for teens and adults who have not had chickenpox.

Last Updated: May 21, 2008

Author: Debby Golonka, MPH

Medical Review: Michael J. Sexton, MD - Pediatrics & Thomas Emmett Francoeur, MDCM, CSPQ, FRCPC - Pediatrics

related physicians

related services

Bon Secours International| Sisters of Bon Secours USA| Bon Secours Health System

This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995-2010 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.